Perhaps you should try some spelling variations:
del filosofia » de filosofia, della filosofia, di filosofia
y literatura » la literatura
casi studio » basic studio, asw studio, ai studio
e filosofia » la filosofia
bist casi » bist das

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: bist casi studio ((del filosofia) OR (e filosofia)) y literatura.
• Adding a wildcard symbol may retrieve word variants: bist casi studio ((del filosofia) or (e filosofia)) y literatura*.